EP 1316589 A2 20030604 - Hydrophobic silica fine powder and its manufacture
Title (en)
Hydrophobic silica fine powder and its manufacture
Title (de)
Feines hydrophobes Kieselsäurepulver und seine Herstellung
Title (fr)
Poudre fine de silice hydrophobe et sa préparation
Publication
Application
Priority
JP 2001365554 A 20011130
Abstract (en)
A hydrophobic silica fine powder is prepared by premixing a hydrophilic silica fine powder with a dimer diol siloxane or cyclic siloxane as a hydrophobizing agent, mixing them in a ball mill for achieving dispersion and for achieving cleavage or disintegration and consolidation, and thereafter heating at 100-300 DEG C in an ammonia or amine-containing atmosphere. The powder has an aerated bulk density of 100-300 g/l, a specific surface area of 40-300 m<2>/g, a primary particle diameter of 10-120 nm, and a degree of hydrophobization of 40-80 as measured by methanol titration and is less bulky, easy to handle and disperse and stable in a kneaded mixture.
IPC 1-7
IPC 8 full level
C01B 33/18 (2006.01); C08K 3/36 (2006.01); C09C 1/28 (2006.01); C09C 1/30 (2006.01); C09C 3/12 (2006.01)
CPC (source: EP US)
B82Y 30/00 (2013.01 - EP US); C01B 33/18 (2013.01 - EP US); C09C 1/3081 (2013.01 - EP US); C01P 2004/62 (2013.01 - EP US); C01P 2004/64 (2013.01 - EP US); C01P 2006/10 (2013.01 - EP US); C01P 2006/12 (2013.01 - EP US); C01P 2006/90 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 1316589 A2 20030604; EP 1316589 A3 20031203; EP 1316589 B1 20100120; DE 60235148 D1 20100311; JP 2003171118 A 20030617; JP 3891265 B2 20070314; US 2003103890 A1 20030605; US 2006115405 A1 20060601; US 7332144 B2 20080219
DOCDB simple family (application)
EP 02258304 A 20021202; DE 60235148 T 20021202; JP 2001365554 A 20011130; US 30515202 A 20021127; US 31523805 A 20051223